Looking back at the 300+ reviews we’ve written on Mainspring, a theme emerges: one of the most difficult things to do for a watch brand is to reinvent a popular genre of horology. To plant the flag into that category, to claim that it is theirs to be, and to come up with a new face for it. Not to copy what has been done before, not to shift things around just enough to claim it is new, but to entirely rethink what this type of watch could be. And brands which take on such difficult enterprises do it fully and commit to offering something wholesome and complete. Not just a novel design but an expansive suite of specifications that supports it. Still looking at those 300+ reviews, another theme emerges: designing theme-based watches that do not look gimmicky is difficult, and oftentimes impossible. Too quickly, and too easily, brands reach for the far-fetched cliché to disguise their horological creations, and more often than not, they look silly. Too much of the wrong thing, too little of the right one. 

Brands which can do new well are rare. Too rare for our own enjoyment of this niche hobby of ours. Because it takes time, energy, creativity and humility to create something familiar and new, something inspired and balanced, something beautiful and restrained. In the past six years, one of the few brands to have achieved this balance is Marloe. which we first discovered through the GMT Day and then the Aerodyne Heart, respectively a GMT and pilot’s watch that look different and cohesive, though designed in two different mini epochs of the British brand. Both are, undeniably, unique and modern, however one appeared to want to be something more and the other to be that more. Marloe went a step further still by creating the SkySplitter, the “more more” if you will, its interpretation of a modern pilot watch, of a true traveler’s timepiece, and of a multi-purpose tool watch graced by bespoke case and dial designs, and completed by a lengthy suite of neat specifications which support the novelty of its design. 

And more importantly: Marloe is selling it for the bankruptcy-capable price of £599/$806 USD.

Specifications  

Though one could consider the SkySplitter to be one of many types of tool watches, given its chameleon nature which we will discuss in a bit, Marloe categorizes it as a pilot watch. By default, pilot watches are tough sons of bitches on account of their intended purpose to be used in the air in a cockpit, banging against levers and dashboards, and historically, in all sorts of weathers and temperatures. (Before air-tight and air-conditioned cockpits of contemporary airplanes.) And though today rare will be the those to wear a pilots watch in the cockpit of Supermarine MkII Spitfire, well, the SkySplitter was designed and engineered to do just well in any kind of airborne machine. More specifically, it was conceived to be technically versatile so that you could survive wild -anding in the Himalayas or surfing the choppy waters of the English Channel in case of emergency or engaging enemy fighter jets over a contemporary war theatre, or simply exploring downtown in a casual fashion on a bright Sunday morning. 

This is the kind of watch some enthusiasts feel immensely attracted to because it can do it all and be it all for us. And thus the first key technical feature of the Marloe SkySplitter—by the way, how cool of a name is that?—is the caliber within which primarily defines what it can do: the “true GMT” Miyota 9075 movement which ticks at 4Hz and comes with 40+ hours of power reserve, where it is the local hour which jumps forward and backward in one-hour increments to easily adjust the time in the time zone you just landed in (or crossed into in the air,) and which comes with a bi-directional date adjustment. Marloe already went an extra step further by sandwiching the 9075 inside a soft-iron cage to augment its anti-magnetic properties to around 20,000 A/m (251 Gauss), or 25% of the magnetic resistance of the IWC Ingenieur and Rolex Milgauss (1,000 Gauss!). This means, in simpler terms, that the Marloe SkySplitter is protected against everyday magnetic fields which emanate from laptops, smartphones, TVs, and cars. 

Having a true GMT caliber inside a soft-iron cage is something we don’t see everyday and which already indicates what the British brand meant to accomplish with this model: to indeed engineer a proper tool watch we can use worry-free for any of the aforementioned scenarios. And it went many steps further: 200 meters of water resistance thanks to an intensively knurled 6.3mm screw-down crown and case-back; a flat piece of sapphire crystal with several layers of inner anti-reflective coating; good applications of blue-glowing lume on the hands, hour markers, and minute hash-marks printed on the rehaut; a fingerprint-coated stainless steel case measuring 40mm in diameter, 45.7mm lug-to-lug, 12.45mm thick, and coming with the a universal 20mm lug width; a bead-blasted three-link “H” style bracelet which tapers to 15.8mm, with screwed links, male end-links (for that superb over-the-wrist bone-draping,) quick-release spring-bars, and a tool-less micro-adjustment mechanism with four positions of adjustments or about 7mm. 

Yes, for 5.5% of the price of the icon the SkySplitter offers a great deal. 

Design 

So what is this “icon” we referred to twice already in this review? The Rolex GMT Master II of course, which any other true GMT watch is instantly compared to unfairly. (And most of which are also instantly more affordable than it is.) At the lowest end of the spectrum, a box fresh GMT Master II will set you back $13,000+ for which you do get a precious metal case and a state-of-the-art in-house caliber, a type of movement the Coronet brand pioneered many decades ago. But, as we’ve argued many times before on Mainspring, who, on God’s Green Earth, would wear such an expensive timepiece to actually fly a plane with unless he or she would be a total jerk? Most humans—not celebrities or ass-licking influencers turned-journalists who desperately want to fit in with the elite*—cannot afford and/or do not see it as being wise to spend such an enormous amount of money, or to wear such an expensive timepiece, to actually do things with, which is why brands such as Marloe exist and why it made the incredible SkySplitter. 

*A little bit of venting on my part, my apologies. 

With all of that said, the Marloe is much more than a cheaper alternative to the Rolex, even though it felt important to make that point because many discerning enthusiasts would rather save up for 20 years rather than get a good traveler’s watch right now. In that same vein, the SkySplitter is, again for 5.5% of the price of the other, visually more interesting and clearly powerfully purpose-driven, and even though we cannot still put a price tag on originality in design, you get a lot more bangs for your bucks with this model given the already healthy list of specifications. (As we’ve argued before also: spending more doesn’t give you a better wearing experience.) After a few detours we can now focus on the visual characteristics of the SkySplitter which are plenty. First, is the fact that Marloe is, as mentioned in the introduction, one of the rare brands which can design theme-based watches without getting into the gimmicky and far-fetched, as it was the case with the Aerodyne. No propeller-shaped handset here. 

Upon opening the box, adjusting the bracelet to my 6.50”/16.5cm wrist, and strapping the SkySplitter on, I was immediately taken aback by the design of the case. The British brand aimed at infusing the steel body with the singular aerodynamics of the fuselage of flying machines which are characterized by pronounced “heart lines” (from the French “ligne de coeur” which refers to the overall shape of a design, usually hand-drawn) which here are embodied in the wide, angled, and curved polished chamfers which beautifully frame the case on both sides. These chamfers depart from the five-sided muscular lugs, which appear to have been sculpted by hand with a chisel, and meet at their center on the case flanks, only to be interrupted on the right by the crown, for which the mid-case flares out a bit to form natural crown-guards. These chamfers are also answered by their twins on the bottom side of the case, making the mide-case appear to be flying above the wrist and narrowing its vertical profile. The side view is superb.

To emphasize the utilitarian nature of SkySplitter, Marloe machined the bezel with a deep knurling, and to emphasize its spectacular shape, added a polished ring between the latter and the crystal, framing the lens perfectly. Seen from above, the case is therefore short but wide, endowed with robust lugs which visually anchor it onto the wrist, and seen from the side, it comes with the majestic and nature-like inspired fullness of a bird’s wingspan and a plane's air-splitting fuselage. And as much creativity and singularity was put into designing the case, so it was with the dial. First, because of the superb handset composed of a stubby hour hand, long minute hand, and thin seconds hand, all partially blacked out and equipped with counter-balances which highlight their instrumental nature and inspiration. The more legible portions of the hour and minute hands are made of matte white surrounds whilst their center welcomes generous applications of lume for superlative nighttime legibility. 

Further take note of the GMT hand which is mostly blacked out, and equipped with a plane-shaped orange tip, and which aligns with a fully graduated GMT scale printed on an elevated ring. It is rare and delightful to see all numerals of GMT scale printed as it makes it more legible and purposeful. The hours are therefore printed in yellow against a dual-colored ring, where a midnight blue portion highlights the nocturnal hours and a mid-gray portion the diurnal hours, together adding subtle pops of colours on an otherwise monochromatic dial. Further above the GMT ring, and passing a barely visible starry blue color accent, we find the minute track printed on an angled rehaut, where the five-minute increments are indicated by way of thicker hash-marks. Lastly, let’s go back to the center of the dial where we find the brand’s logo above the pinion, the words “Skyplitter” and “200M Tested” printed in dark grey below it, as well as “British Made” printed in the same color around the six o’clock marker.

Lastly still, and perhaps more interestingly, let’s take a quick look at the date aperture located at the three and spread across three layers: first, a trapezoidal opening was carved out from the dial main and complemented by a level-like diagram on its left side; then a recessed and framed rectangular aperture was carved out and flanked by two outward-facing arrows; then there is the black date disc with numerals printed in white for legibility sake. These numerals, as well as those found for the hour markers and GMT scale, are bespoke to Marloe and further singularizes the design of this piece, and the way the date aperture was designed and constructed further emphasizes the brand’s hyper-focused design language which aimed at making the SkySplitter appear to be a gauge which naturally belonged onto the dashboard of a plane’s cockpit. 

The Heart of the Matter

After having gone through a world-record long section on the design of any timekeeping device, it is clear that Marloe created something particularly unique with the SkySplitter: a bespoke pilot’s watch which both reinterprets the classical design elements of such timepiece and which then threw in as much visual originality as it could whilst preserving a profound sense of balance, symmetry, and cohesion throughout. A bit like it seemed odd more than a century ago to have large pieces of metal fly 30,000 feet above ground, it often seems impossible nowadays for a small independent watch brand to create such novelty in such a neat package and for such a low price. Because beyond the superb design of its case and dial (however subjective this statement might be,) the SkySplitter is also technically ultra sound and appropriately complete for any type of adventure, as well as being indeed bankruptcy-capable (for Marloe) affordable as it will only set you back £599/$806 USD, again 5.5% of the price of icon.

By pricing its unique creations so low and for making such a high-value timepiece accessible to all us, the brand’s intent is to democratize good tool watches which is not what luxury brands aim at doing, of course, and which explains the perhaps dubious comparison to the Rolex GMT Master II. 

Conclusion

The last pieces of information which will be pressed upon you are these: the SkySplitter comes in two versions, the black Jetstream we looked at today and the grey Airway. Two safe and highly contrasting colorways which make for the perfect instrumental tool watch. And lastly: both models go on sale Friday, April 17th, 2026, for the aforementioned price of £599/$806 USD for which you get the metal bracelet and a leather or canvas strap. 

Thanks for reading.